Bank Math

A man's speed with the current of a river is 15 km/hr and the speed of the current is 2.5 km/hr. What is the man's speed against the current?

The system of equation has how many solutions?
3x - 6y = 9
2y - x - 3 = 0

The present age of Habib and Shikha are in the ratio of 6 : 4. Five years ago their ages were in the ratio of 5 : 3. How old is Habib now?

In a 729 liters mixture of milk and water, the ratio of milk to water 7 : 2. To get a new mixture containing milk and water in the ratio 7 : 3, the amount of water to be added is

How many pieces of 85 cm length stick can be cut from a 42.5 meters long stick?

You are looking at a billboard 40m away with an angle of elevation of 30°. At what height is the billboard?

Apu took 3/5 of the marbles kept in a box. His younger took another 3/5 of remaining marbles. Then his sister took another 3/5 of the remaining marbles. What fractions of the marbles are left in the box?

Which one of the following fractions is greater than 1/2? 

Assurance company has a project that wil take 1000 person days to complete. How many days will it take to complete the project if the company has 50 workers?

What is the annual interest rate on an account that earns Tk. 948 in simple interest over 36 months with an initial deposit of Tk. 7900?

In square ABCD below, what is the value of (AC)(AD)/(AB)(DC) =?

In a certain country. A person is born every 7 seconds and a person dies every 13 seconds. Therefore, the birth and death rates account for a population growth rate of one person every---

In still water, a boat can travel at 5 km/hr. It takes 1 hour to row to a place and come back. If the velocity of the stream is 1 km/hr, how far is the place?

(Each of the following questions consists of two statements given below it. You have to decide which (if any) statement (s) is (are) sufficient to answer the given question)

What is the area of the triangle ABC?
i) ABC is a right-angle triangle
ii) The lengths of the longest and the shortest sides of ABC are 13 meters and 5 meters respectively-

A shopkeeper gains 17% after allowing a discount of 10% on the marked price of an article. Find his profit percent if the article is sold at marked price allowing no discount.

The average of 6 numbers is 25. If 3 more numbers, with an average of 22 are added to these numbers, what will be the average of the combined 9 numbers?

(০.২)^২ ÷ (০.১)^৩ = কত?

On a 2 km road, a total of 201 trees are planted on the side of the road at equal distance. How many such trees will be planed on a 50 km road such that the distance between two consecutive trees is the same as that of the consecutive trees on the 2km road?

An inspector notices a thief from a distance of 200 meters after this thief starts running and the inspector chases him. The inspector and the thief run at the speed of 11 km/hr and 10 km/hr respectively. The distance between them after 6 minutes is?

6 pints of a 20 percent solution of methanol in water are mixed with 4 pints of a 10 percent methanol in water solution. The percentage methanol in the new solution is